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News & Recent Publications

Thursday, January 09, 2014

Potential Geothermal Resources for Akutan, Alaska

Press Release & Publication 
Akutan Volcano hosts a geothermal system that includes a fumarole field at about 400 meters (1312 feet) elevation on the northeast flank of the volcano and a series of hot springs that discharge close to sea level on the northeast side of the island. Numerous industry-led geophysical studies and test drilling in the past few years have proven the existence of a geothermal resource. USGS field studies completed in 2012 suggest that the available geothermal resource may be even larger than previously recognized.

Thursday, April 07, 2011

Natural Gas Production and Anomalous Geothermal Gradients of the Deep Tuscaloosa Formation

USGS Publication: Open-File Report 2011-1086
For the largest producing natural gas fields in the onshore Gulf of Mexico Basin, the relation between temperature versus depth was investigated. Prolific natural gas reservoirs with the highest temperatures were found in the Upper Cretaceous downdip Tuscaloosa trend in Louisiana.

Monday, September 20, 2010

Temperature Data From Wells in Long Valley Caldera, California

USGS Publication: Data Series 523, Version 1.0
Long Valley Caldera (LVC) in eastern California has been the site of extensive research on geothermal resources and volcanic hazards. The database contains temperature logs obtained by private industry, the U.S. Geological Survey, and Sandia National Laboratory.

Monday, September 29, 2008

Assessment of Moderate- and High-Temperature Geothermal Resources of the United States

Press Release & Publication
Geothermal power production could significantly add to the electric power generating capacity in the United States. The assessment indicates that the electric power generation potential from identified geothermal systems is 9,057 Megawatts-electric (MWe), distributed over 13 states.


photo: geothermal power plants at the Casa Diablo geothermal field.
Map showing Earth’ s main lithospheric plates and
some of the world’s active volcanoes (triangles)
(Larger Image).

During the past three decades, shallow- to intermediate-depth research wells have been drilled in the Imperial Valley (the Salton Sea, California, Scientific Drilling Project), at the Inyo Domes, California, in the Valles Caldera, New Mexico, and in the Cascade Range of the Pacific Northwest. In addition, reconnaissance-style drilling to determine heat flow and hydrologic characteristics was completed over much of the Western United States. The U.S. Geological Survey (USGS) participated in most of these multidisciplinary, multiagency projects. Among them are the U.S. Department of Energy’s (DOE) Long Valley Caldera Exploratory Well (LVEW), California, support for USGS projects in Hawai‘i (funded by the National Science Foundation), and multiagency projects at The Geysers, California. Foreign projects include those at Soultz sous-ForĂȘt (France), Iceland, Tyrniauz (Russia), and several projects in Japan (for example, Kakkonda). USGS personnel were involved in the planning of scientific experiments at each of these sites.

Jonathan Glen
Project Chief


Geothermal Studies in the United States
Geothermal Studies in U.S.

Geothermal Studies in the United States

In 2008 USGS Scientists completed an assessment of our Nation’s geothermal resources. Geothermal power plants are currently operating in six states: Alaska, California, Hawaii, Idaho, Nevada, and Utah. 

[+] Go to Press Release





Slide Presentation: The USGS National Geothermal Resource Assessment
Colin F. Williams, USGS, Menlo Park, CA
Brenda S. Pierce , USGS, Reston, VA
Flash Document (10 MB) or  PDF (10MB)

USGS Multimedia

Geothemal Multimedia Gallery

External Multimedia

KQED QUEST TV story, "Geothermal Heats Up" featuring USGS Scientist, Colin Williams:

QUEST KQED Public Media.


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Page Last Modified: Wednesday, December 03, 2014



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